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| author | James Hogan <james.hogan@imgtec.com> | 2016-06-14 09:40:15 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-06-14 11:16:24 +0200 |
| commit | 6398da1391ba9285aeb4fa3f4470f008bf730220 (patch) | |
| tree | e52e4f068c7e266408b9f8c1d317aa31e851e952 /arch/mips/kvm/trace.h | |
| parent | 93258604ab6d3f2bdc6cb02f61961af56712f144 (diff) | |
| download | op-kernel-dev-6398da1391ba9285aeb4fa3f4470f008bf730220.zip op-kernel-dev-6398da1391ba9285aeb4fa3f4470f008bf730220.tar.gz | |
MIPS: KVM: Trace guest register access emulation
Trace emulation of guest access to various registers via
MFC0/MTC0/DMFC0/DMTC0 instructions (coprocessor 0) and the RDHWR
instruction (hardware registers exposed to userland), replacing some
existing kvm_debug calls. Trace events are much more practical for this
kind of debug output.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/mips/kvm/trace.h')
| -rw-r--r-- | arch/mips/kvm/trace.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/arch/mips/kvm/trace.h b/arch/mips/kvm/trace.h index aec1c43..5d712ec 100644 --- a/arch/mips/kvm/trace.h +++ b/arch/mips/kvm/trace.h @@ -124,6 +124,94 @@ TRACE_EVENT(kvm_exit, __entry->pc) ); +#define KVM_TRACE_MFC0 0 +#define KVM_TRACE_MTC0 1 +#define KVM_TRACE_DMFC0 2 +#define KVM_TRACE_DMTC0 3 +#define KVM_TRACE_RDHWR 4 + +#define KVM_TRACE_HWR_COP0 0 +#define KVM_TRACE_HWR_HWR 1 + +#define KVM_TRACE_COP0(REG, SEL) ((KVM_TRACE_HWR_COP0 << 8) | \ + ((REG) << 3) | (SEL)) +#define KVM_TRACE_HWR(REG, SEL) ((KVM_TRACE_HWR_HWR << 8) | \ + ((REG) << 3) | (SEL)) + +#define kvm_trace_symbol_hwr_ops \ + { KVM_TRACE_MFC0, "MFC0" }, \ + { KVM_TRACE_MTC0, "MTC0" }, \ + { KVM_TRACE_DMFC0, "DMFC0" }, \ + { KVM_TRACE_DMTC0, "DMTC0" }, \ + { KVM_TRACE_RDHWR, "RDHWR" } + +#define kvm_trace_symbol_hwr_cop \ + { KVM_TRACE_HWR_COP0, "COP0" }, \ + { KVM_TRACE_HWR_HWR, "HWR" } + +#define kvm_trace_symbol_hwr_regs \ + { KVM_TRACE_COP0( 0, 0), "Index" }, \ + { KVM_TRACE_COP0( 2, 0), "EntryLo0" }, \ + { KVM_TRACE_COP0( 3, 0), "EntryLo1" }, \ + { KVM_TRACE_COP0( 4, 0), "Context" }, \ + { KVM_TRACE_COP0( 4, 2), "UserLocal" }, \ + { KVM_TRACE_COP0( 5, 0), "PageMask" }, \ + { KVM_TRACE_COP0( 6, 0), "Wired" }, \ + { KVM_TRACE_COP0( 7, 0), "HWREna" }, \ + { KVM_TRACE_COP0( 8, 0), "BadVAddr" }, \ + { KVM_TRACE_COP0( 9, 0), "Count" }, \ + { KVM_TRACE_COP0(10, 0), "EntryHi" }, \ + { KVM_TRACE_COP0(11, 0), "Compare" }, \ + { KVM_TRACE_COP0(12, 0), "Status" }, \ + { KVM_TRACE_COP0(12, 1), "IntCtl" }, \ + { KVM_TRACE_COP0(12, 2), "SRSCtl" }, \ + { KVM_TRACE_COP0(13, 0), "Cause" }, \ + { KVM_TRACE_COP0(14, 0), "EPC" }, \ + { KVM_TRACE_COP0(15, 0), "PRId" }, \ + { KVM_TRACE_COP0(15, 1), "EBase" }, \ + { KVM_TRACE_COP0(16, 0), "Config" }, \ + { KVM_TRACE_COP0(16, 1), "Config1" }, \ + { KVM_TRACE_COP0(16, 2), "Config2" }, \ + { KVM_TRACE_COP0(16, 3), "Config3" }, \ + { KVM_TRACE_COP0(16, 4), "Config4" }, \ + { KVM_TRACE_COP0(16, 5), "Config5" }, \ + { KVM_TRACE_COP0(16, 7), "Config7" }, \ + { KVM_TRACE_COP0(26, 0), "ECC" }, \ + { KVM_TRACE_COP0(30, 0), "ErrorEPC" }, \ + { KVM_TRACE_HWR( 0, 0), "CPUNum" }, \ + { KVM_TRACE_HWR( 1, 0), "SYNCI_Step" }, \ + { KVM_TRACE_HWR( 2, 0), "CC" }, \ + { KVM_TRACE_HWR( 3, 0), "CCRes" }, \ + { KVM_TRACE_HWR(29, 0), "ULR" } + +TRACE_EVENT(kvm_hwr, + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int op, unsigned int reg, + unsigned long val), + TP_ARGS(vcpu, op, reg, val), + TP_STRUCT__entry( + __field(unsigned long, val) + __field(u16, reg) + __field(u8, op) + ), + + TP_fast_assign( + __entry->val = val; + __entry->reg = reg; + __entry->op = op; + ), + + TP_printk("%s %s (%s:%u:%u) 0x%08lx", + __print_symbolic(__entry->op, + kvm_trace_symbol_hwr_ops), + __print_symbolic(__entry->reg, + kvm_trace_symbol_hwr_regs), + __print_symbolic(__entry->reg >> 8, + kvm_trace_symbol_hwr_cop), + (__entry->reg >> 3) & 0x1f, + __entry->reg & 0x7, + __entry->val) +); + #define KVM_TRACE_AUX_RESTORE 0 #define KVM_TRACE_AUX_SAVE 1 #define KVM_TRACE_AUX_ENABLE 2 |
